20040084 has 36 divisors (see below), whose sum is σ = 52861536. Its totient is φ = 6389328.

The previous prime is 20040071. The next prime is 20040133. The reversal of 20040084 is 48004002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11274 + ... + 12929.

It is an arithmetic number, because the mean of its divisors is an integer number (1468376).

Almost surely, 2^20040084 is an apocalyptic number.

It is an amenable number.

20040084 is an abundant number, since it is smaller than the sum of its proper divisors (32821452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20040084 is a wasteful number, since it uses less digits than its factorization.

20040084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24236 (or 24231 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20040084 is about 4476.6152392181. The cubic root of 20040084 is about 271.6229818391.

Adding to 20040084 its reverse (48004002), we get a palindrome (68044086).

The spelling of 20040084 in words is "twenty million, forty thousand, eighty-four".